#define  _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#define PI 3.14f

int main(void)
{
	int radius = 0;
	printf("Please input the radius of the ball.");
	scanf("%d", &radius);
	int radius3 = radius * radius * radius;
	float volume = 4.0f / 3.0f * PI * radius3;

	printf("The volume of the ball is %f cubic metre.\n", volume);

	return 0;
}